#!/usr/bin/python3
# Copyright 2023 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Targets primarily code in lib/yaml/emitter.py. """
import sys
import atheris

import io
import yaml

def TestOneInput(data):
  try:
    events = list(yaml.parse(io.BytesIO(data)))
  except yaml.YAMLError:
    return
  except RecursionError:
    return
  try:
    output = yaml.emit(events)
  except yaml.emitter.EmitterError:
    return
  except RecursionError:
    return

  # At this point the output should be good to parse cleanly.
  yaml.parse(output)

def main():
  atheris.instrument_all()
  atheris.Setup(sys.argv, TestOneInput)
  atheris.Fuzz()

if __name__ == "__main__":
  main()
